Liard



106. COMPOSITIONS,

g C COATING OR PLASTIC.

UNITED STATES EXAMINER PATENT ()FFICE' NAUM WEINTRAUB-SCHNORR, OFGENEVA, SWITZERLAND, ASSIGNOR TC LA SOCIETE CI-IIMIQUE DES USINESRIIONE, ANCIENNEMENT GIL- LIARD, P. MONNET ET CARTIER, OF LYONS, FRANCE.

COMPOUND FOR CLOSING PUNCTURES IN PNEUMATIC TIRES.

SPECIFICATION forming part of Letters PatentNo. 606,751, dated July 5,1898.

Application filed July 1. 1897- BerialNO- 643,164. (No specimens.)

To all whom 'it may concern:

Be it known that I, NAUM WEINTRAUB- Scurvonn, of 4 Chemin de laChevilliard, Geneva, Switzerland, have invented certain 5 new and usefulImprovements in Pneumatic Tires and a Liquid for Closing PuncturesTherein, of which the following is a specification.

The primary object of this invention is to provide an improved compoundfor the automatic and immediate closing of punctures produced inpneumatic tires or tubes by nails, broken glass, or the like, andthereby preventing escape of air.

I According to this invention the tire contains an improved liquid,which is introduced into the tire preferably before this is inflated,the liquid being of such a nature as to close any such puncture bypenetrating into the puncture and hardening.

I am aware that there have been introduced into pneumatic tires for asimilar purpose such liquids as oil or aqueous solution of gum orgelatin or hygroscopic liquid containing silicic or aluminium hydrateorother finely-divided substances in suspension. The oil or aqueoussolutions of gum or gelatin do not, however, harden in the puncture,and, moreover,they have a more or less deleterious 3o influence on therubber of .the tire. On the other hand, the hygroscopic liquidscontaining materials in suspension depend upon the blocking of thepuncture with the solid particles held in suspension and cannot, likesolutious, be introduced through the valveof the inner tube asconvenience requires.

The liquidmade according to my invention is alkaline, whereas theliquids previously in use are acid'or neutral.

40 The basis of the liquid is a silicate soluble in water to which-isadded-an agglu'tinant'or adfie'sive medium.

xamp e: may suitably employ an aqueons solution containing, in onehundred water-glass.

MY; B

parts, thirty parts water-"lass twenty parts sugar, and fivepar'tfiiextrme.

- y*wat-er-glass"l mean an silicate at discretion which is soluble inwater. The sugar and dext-riue may lie substituted by other arboh'drates and generally by any aggluihn-' i 1n water which is indifferentto The proportions may be varied within considerable limits.

If liquid or soluble albumen or other agglutinants containing nitrogenare employed, 5 5 it, will be necessary to add to the solution a smallproportion of a suitable antiseptic soluble in water.

The bringing together of the ingredients mentioned in aqueous solutionmay be ef- 6o fected by simple admixture without necessity for aparticular method of preparation. After proper admixture the liquid isready for immediate use.

About one hundred grams are poured through the valve of the tire, whichis then pumped up in the usual way, and the liquid is allowed to remaintherein during use. In consequence of the great pressure existing in thetire and of the centrifugal force created by the rotation of the wheelthe liquid penetrates into any puncture which may occur and'immediatelycloses the same in an absolutely air-tight manner.

What I claim, and desire to secu re by Letters Patent, is-- An alkalineliquid for closing punctures -in pneumatic tires, said liquid consistingof an aqueous solution of water-glass, sugar and dextrine insubstantially the proportions 8o specified.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

NAUM WEINTRAI'Ii-SCHNORII.

\Vitnesses: FEED. ADOLF Pearson, Fnrrz ULLMANN.

